xuejinliang的专栏

#!/usr/bin/env python#_*_ coding:utf-8 _*_user_file = 'userlist.txt'info = raw_input('Input the info to search: ')f = file(user_file,'rb')count = 0for line  in f.xreadlines():    line =

python利用多进程生成多线程 #!/usr/bin/env python#_*_ coding:utf-8 _*_ from multiprocessing import Poolimport threadingimport osdef f(n): #每个进程生成4个线程    for i in range(4):        t = th

Python生成进程方法#!/usr/bin/env python#_*_ coding:utf-8 _*_from multiprocessing import Pooldef f(n):    return n*n if __name__ == '__main__':    pool = Pool(processes=5)    res_list = [

Python生成进程利用Process模块来生成进程 #!/usr/bin/env python#_*_ coding:utf-8 _*_from multiprocessing import Processimport timedef f(x,n):    print x    print n    time.sleep(2)if __name__

进程是CPU最小的资源分配的单位。进程之间的资源是不能共享的。但是线程之间的资源可以是共享的。下面简单的介绍两种方法实现进程之间资源的共享。1、queue方法：#!/usr/bin/env python#_*_ coding:utf-8 _*_from multiprocessing import Process,Queuedef f(q,x):    q.put([x

Python多进程和多线程简析进程是资源分配的最小单位，但是线程是CPU执行的最小的单元，进程和线程的选择，和程序是属于CPU密集型或者是IO密集型也是存在着很大的关系的。1、CPU密集型：如果属于CPU密集型，程序选择多线程。首先一个线程可以在多个CPU之间运行，如果分配多个CPU可以明显的提高程序的效率。2、IO密集型：IO操作本身就是不需要CPU进行处理的，并且单个线程只

from multiprocessing import Process,Managerdef  f(d,l):    d[0] = 0    d['2'] = 'hello world'    d['3'] = None    l.reverse()if __name__ == '__main__':    manger = Manager()    #声明一个

#!/usr/bin/env python#_*_ coding:utf-8 _*_import paramikossh_private_path = 'home/hello/.ssh/id_rsa'key = paramiko.RSAKey.from_private_key_file(ssh_private_path)ssh  = paramiko.SSHCl

#!/usr/bin/env python#_*_ coding:utf-8 _*_import paramikossh = paramiko.SSHClient()ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())ssh.connect('192.168.145.129',22,'root','exit'

#!/usr/bin/env python#_*_ coding:utf-8 _*_from threading import Threadimport timefrom Queue import Queueclass producer(Thread):    #producer __init__     def __init__(self,name,queue):

#!/usr/bin/env python#_*_ coding:utf-8 _*_name  = ['hello', 'world', 'a', 'b', 'c', 1, 2, 3, 'hello', 'world', 'a', 'b', 'c', 1, 2, 3]first_pos = 0for i in range(name.count(2)):    new_list

#!/usr/bin/env python#_*_ coding:utf-8 _*_import os import syscount=3retry_count=0account_file='/home/hello/login.txt'lock_file='/home/hello/lock.txt'while retry_count     username=r

#!/usr/bin/env python#_*_ coding:utf-8 _*_count = 0 print_num=input('input the number you want to got: ')while count     if count == print_num:        print 'the number is got',count   

#!/usr/bin/env python#_*_ codeing:utf-8 _*_name=raw_input('name:')job=raw_input('job:')salary=raw_input('salary:')real_age=23for i  in range(10):    age=input('age:')    if age > real_

Python在安装模块的过程中，有时候会遇到如下问题：error: could not create'/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7/greenlet':Operation not permitted简单的处理方法就是：pip install module_name –